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我使用advanced recycler view创建拖放网格视图&。我基于库的作者提供的示例基于我的代码。一切似乎工作得很好，拖放很好地保存它的状态，交换位置等，但我无法附加到这个简单的项目点击监听器。这就像RecyclerViewDragDropManager与它的包装适配器只能做那些拖放操作。 我很困惑，在这种情况下点击侦听器应该去哪里，因为通常在RecyclerView中，您可以附加到您的适配器bindView，但是我的适配器只有在长时间点击后才会触发，并且只处理拖放操作。高级回收站视图 - 处理物品单击和长按拖动操作
我试图从堆栈上的每一个解释如何将点击侦听器附加到RecyclerView，似乎没有任何工作。
我需要的是截取动作，如果长时间的点击没有被激发并知道它发生在哪个项目上。
下面是片段建立recyclerview和适配器代码：
private void setLayout() {
mRecyclerView = (RecyclerView) mView.findViewById(R.id.recycler_view);
mLayoutManager = new GridLayoutManager(mContext, Const.GRID_ROW_SIZE, GridLayoutManager.VERTICAL, false);
//drag & drop manager
mRecyclerViewDragDropManager = new RecyclerViewDragDropManager();
mRecyclerViewDragDropManager.setDraggingItemShadowDrawable(
(NinePatchDrawable) ContextCompat.getDrawable(mContext, R.drawable.material_shadow_z3));
//start dragging after long press
mRecyclerViewDragDropManager.setInitiateOnLongPress(true);
mRecyclerViewDragDropManager.setInitiateOnMove(false);
mRecyclerViewDragDropManager.setLongPressTimeout(Const.LONG_PRESS_DRAG_TIMEOUT);
}
private void setWrappedAdapter(DraggableGridAdapter draggableGridAdapter) {
mAdapter = draggableGridAdapter;
mWrappedAdapter = mRecyclerViewDragDropManager.createWrappedAdapter(draggableGridAdapter); //wrap for dragging
final GeneralItemAnimator animator = new RefactoredDefaultItemAnimator();
mRecyclerView.setLayoutManager(mLayoutManager);
mRecyclerView.setAdapter(mWrappedAdapter); // requires *wrapped* adapter
mRecyclerView.setItemAnimator(animator);
if (supportsViewElevation()) {
// Lollipop or later has native drop shadow feature. ItemShadowDecorator is not required.
} else {
mRecyclerView.addItemDecoration(new ItemShadowDecorator((NinePatchDrawable)
ContextCompat.getDrawable(mContext, R.drawable.material_shadow_z1)));
}
mRecyclerViewDragDropManager.attachRecyclerView(mRecyclerView);
mRecyclerViewDragDropManager.setItemMoveMode(RecyclerViewDragDropManager.ITEM_MOVE_MODE_DEFAULT);
mAdapter.setItemMoveMode(RecyclerViewDragDropManager.ITEM_MOVE_MODE_DEFAULT);
}
而且适配器的代码：
public class DraggableGridAdapter extends RecyclerView.Adapter<DraggableGridAdapter.MyViewHolder>
implements DraggableItemAdapter<DraggableGridAdapter.MyViewHolder> {
private static final String TAG = "MyDraggableItemAdapter";
private int mItemMoveMode = RecyclerViewDragDropManager.ITEM_MOVE_MODE_DEFAULT;
// NOTE: Make accessible with short name
private interface Draggable extends DraggableItemConstants {
}
private AbstractDataProvider mProvider;
public static class MyViewHolder extends AbstractDraggableItemViewHolder {
public FrameLayout mContainer;
public View mDragHandle;
public TextView mTextView;
public MyViewHolder(View v) {
super(v);
mContainer = (FrameLayout) v.findViewById(R.id.container);
mDragHandle = v.findViewById(R.id.drag_handle);
mTextView = (TextView) v.findViewById(android.R.id.text1);
}
}
public DraggableGridAdapter(AbstractDataProvider dataProvider) {
mProvider = dataProvider;
// DraggableItemAdapter requires stable ID, and also
// have to implement the getItemId() method appropriately.
// Ids must be unique not changing with position.
setHasStableIds(true);
}
public void setItemMoveMode(int itemMoveMode) {
mItemMoveMode = itemMoveMode;
}
@Override
public long getItemId(int position) {
return mProvider.getItem(position).getId();
}
@Override
public int getItemViewType(int position) {
return mProvider.getItem(position).getViewType();
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
final LayoutInflater inflater = LayoutInflater.from(parent.getContext());
final View v = inflater.inflate(R.layout.list_grid_item, parent, false);
return new MyViewHolder(v);
}
@Override
public void onBindViewHolder(MyViewHolder holder, final int position) {
final AbstractDataProvider.Data item = mProvider.getItem(position);
// TODO: 2016-09-09 Add switch for checklist items
//set text
holder.mTextView.setText(item.getPlainText());
final int dragState = holder.getDragStateFlags();
if (((dragState & Draggable.STATE_FLAG_IS_UPDATED) != 0)) {
int bgResId;
if ((dragState & Draggable.STATE_FLAG_IS_ACTIVE) != 0) {
bgResId = R.drawable.bg_item_dragging_active_state;
com.example.Utilities.DrawableUtils.clearState(holder.mContainer.getForeground());
} else if ((dragState & Draggable.STATE_FLAG_DRAGGING) != 0) {
bgResId = R.drawable.bg_item_dragging_state;
} else {
bgResId = R.drawable.bg_item_normal_state;
}
holder.mContainer.setBackgroundResource(bgResId);
}
}
@Override
public int getItemCount() {
return mProvider.getCount();
}
@Override
public void onMoveItem(int fromPosition, int toPosition) {
Log.d(TAG, "onMoveItem(fromPosition = " + fromPosition + ", toPosition = " + toPosition + ")");
if (fromPosition == toPosition) {
return;
}
if (mItemMoveMode == RecyclerViewDragDropManager.ITEM_MOVE_MODE_DEFAULT) {
mProvider.moveItem(fromPosition, toPosition);
notifyItemMoved(fromPosition, toPosition);
} else {
mProvider.swapItem(fromPosition, toPosition);
notifyDataSetChanged();
}
}
@Override
public boolean onCheckCanStartDrag(MyViewHolder holder, int position, int x, int y) {
return true;
}
@Override
public ItemDraggableRange onGetItemDraggableRange(MyViewHolder holder, int position) {
// no drag-sortable range specified
return null;
}
@Override
public boolean onCheckCanDrop(int draggingPosition, int dropPosition) {
return true;
}
这里的示例代码我试过，但没有工作，从适配器onBindViewHolder方法：
public void onBindViewHolder(MyViewHolder holder, final int position) {
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d(TAG, "Clicked " + position);
}
});
}